conserve
v.
late 14c., from Old French conserver (9c.), from Latin conservare "to keep, preserve, keep intact, guard," from com-, intensive prefix (see com-), + servare "keep watch, maintain" (see observe). Related: Conserved; conserving. As a noun (often conserves) from late 14c.
〔李〕[con-;serv;-e] v.保存； 用糖渍； 使守恒 ←serv (L servare)=to keep or protect 保护，保存